CN102778215B - Method for determining capacity of underground reservoir of mine - Google Patents

Abstract

The invention discloses a method for determining the storage capacity of an underground water reservoir in a mine. The method includes the following steps: step ①: measuring the rock mass strength, coal seam burial depth, coal seam thickness and mining size of the mine underground water reservoir to be tested; step ②: setting Reference mine underground reservoir, the rock mass strength, coal seam burial depth, coal seam thickness and mining size of the reference mine underground reservoir are consistent with the mine underground reservoir to be tested; step ③: measure the water storage V ₂ and reservoir area S of the reference mine underground reservoir and water head H, calculate the water storage coefficient R=V ₂ /SH; step ④: measure the reservoir volume V ₁ of the underground reservoir of the mine to be tested, and calculate the storage capacity of the underground reservoir of the mine to be tested V=V ₁ ×R. The invention can obtain the underground water storage capacity of the mine, thereby regulating the water resource in the mine area.

Description

A method for determining the storage capacity of mine underground reservoir

technical field

The invention relates to a method for determining the capacity of a reservoir, in particular to a method for determining the capacity of an underground reservoir in a mine.

Background technique

There are abundant coal resources in the west of our country, but the water resources are scarce. The shortage of water resources poses a serious threat to the economic development of the west and the improvement of people's lives. Mine water is produced during coal mining, and an average of 2 tons of waste water needs to be discharged for every ton of coal mined. However, at present, groundwater in mines is still mainly pumped to the ground. Due to seasonal factors such as water resources utilization, water resources are greatly consumed. Waste aggravates the imbalance of local supply. At the same time, most of the current treatment methods for mine water suspended solids and water quality are still mine water is discharged underground to the ground for treatment, and it is easy to cause secondary pollution. Such technology further worsens the water shortage in the mining area and surrounding areas, seriously restricts the normal production of the mining area, and is not conducive to the coordinated development of resources and the environment.

At present, there have been some attempts to protect groundwater resources, but these methods and technologies are all methods of purifying mine water through underground or ground treatment. For water-scarce areas such as the west, it is impossible to solve the problem of seasonal imbalance in water supply. At the same time, the loss of groundwater is not conducive to the restoration of the local ecological environment. The establishment of mine underground reservoirs is an important means to solve the problem of water use in mining areas and the imbalance of water use. Therefore, it is necessary to measure the storage capacity of mine underground reservoirs to rationally allocate mine groundwater resources.

Contents of the invention

In view of the problems existing in the prior art, the object of the present invention is to provide a method for determining the storage capacity of underground water reservoirs in mines, which can obtain the storage capacity of underground water in mines, thereby regulating water resources in mine areas.

The above object of the present invention is achieved through the following technical solutions:

A method for determining the storage capacity of an underground reservoir in a mine, said method comprising the steps of:

Step ①: Determine the rock mass strength, coal seam burial depth, coal seam thickness and mining size of the underground reservoir of the mine to be tested;

Step ②: Set the reference mine underground reservoir, the rock mass strength, coal seam burial depth, coal seam thickness and mining size of the reference mine underground reservoir are consistent with the mine underground reservoir to be measured;

Step ③: Measure the water storage capacity V ₂ , reservoir area S and water head H of the underground reservoir of the reference mine, and calculate the water storage coefficient R=V ₂ /SH;

Step ④: measure the reservoir volume V ₁ of the underground reservoir of the mine to be tested, and calculate the storage capacity V=V ₁ ×R of the underground reservoir of the mine to be tested.

Further, in step ③, the water storage volume V ₂ of the reference mine underground reservoir is determined by charging and discharging the water storage of the reference mine underground reservoir.

Further, in step ④, the reservoir volume V ₁ is determined according to the size of the mine goaf.

Further, the method further includes step ⑤: measure the reservoir area S ₂ and water head H ₂ of the underground reservoir of the mine to be tested, and calculate the water storage capacity V ₃ =S ₂ ×H ₂ ×R of the underground reservoir of the mine to be tested.

Further, in step ②, the reference mine underground reservoir is a mine underground reservoir model, which has the same rock mass strength, coal seam burial depth, coal seam thickness and mining size as the mine underground reservoir to be tested.

Further, the rock mass strength is the crushing strength of the coal seam.

The invention obtains the storage capacity of the mine underground reservoir by measuring and calculating the reservoir volume and the storage capacity coefficient, which facilitates the knowledge of the water storage capacity of the mine underground reservoir, thereby solving the problems of difficult and unbalanced water use in the mine area, and realizing reasonable protection of the groundwater.

Description of drawings

Fig. 1 is a flow chart of a preferred method for determining the storage capacity of underground reservoirs in mines according to the present invention.

Detailed ways

Below in conjunction with embodiment, the invention is described in detail.

The method for determining the storage capacity of the mine underground reservoir provided by the invention comprises the following steps:

Step ①: Determine the rock mass strength, coal seam burial depth, coal seam thickness and mining size of the underground reservoir of the mine to be tested. For example, the rock mass strength (coal seam crushing strength) of the underground reservoir is 88, the coal seam burial depth is 95m, the coal seam thickness is 3.7m and the mining size is 200m×1500m.

Step ②: set the reference mine underground reservoir, the rock mass strength, coal seam burial depth, coal seam thickness and mining size of the reference mine underground reservoir are consistent with the mine underground reservoir to be measured, the present invention can preferably establish the reference mine underground reservoir model, Make the rock mass strength, coal seam burial depth, coal seam thickness and mining size of the model consistent with the mine underground reservoir to be tested. Specifically, the reference mine underground reservoir model of the present invention is constructed through similar material model tests and analyzed through numerical simulation calculations. Of course, considering that the goaf near the mine underground reservoir to be tested is similar to the rock mass strength, coal seam burial depth, coal seam thickness and mining size of the mine underground reservoir to be tested, the present invention can also adopt a similar method to the mine underground reservoir to be tested. The mine goaf is used as the reference mine underground reservoir, for example: the present invention can also adopt the 2-2 coal seam underground reservoir and the 5-2 coal seam underground reservoir as the reference mine underground reservoir.

Step ③: Measure the water storage volume V ₂ , reservoir area S and water head H of the underground reservoir of the reference mine, and calculate the water storage coefficient R=V ₂ /SH. In the present invention, the water storage volume V ₂ of the underground water reservoir of the reference mine can be calculated preferably by charging and discharging the water storage of the underground water reservoir of the reference mine. The present invention can actually measure the flow velocity and time per unit time, calculate the water storage capacity, and can also calculate the water storage volume _V of the reference mine underground reservoir according to the water pump parameters (displacement per hour). For example, the water storage volume _V of the reference mine underground reservoir in this embodiment = 45,000m ³ , reservoir area S=300,000m ² , and water head H=1m. Therefore, according to R=V ₂ /SH, it can be known that the water storage coefficient of the underground reservoir in the 2-2 coal seam six panel area of Shenhua Group's Shendong mining area is 0.15 .

Step ④: measure the reservoir volume V ₁ of the underground reservoir of the mine to be tested, and calculate the storage capacity V=V1×R of the underground reservoir of the mine to be tested. The present invention can preferably determine the reservoir volume V1 according to the size of the mine goaf. For example, the underground reservoir in the sixth panel area of Daliuta Coal Seam 2-2 in the Shendong mining area of Shenhua Group is 1500m long, 600m wide, and the overlying bedrock caving zone is 20m high. Therefore, the calculated volume of the underground reservoir is 18×10 ⁶ m ³ , Therefore, according to V=V1×R, the storage capacity of the underground reservoir in the six-panel area of the 2-2 coal seam in Daliuta Mine is 27×10 ⁵ m ³ .

After knowing the storage capacity of the reservoir, the present invention can further measure the water storage capacity of the reservoir, which can be realized by step ⑤: measure the reservoir area S ₂ and water head H ₂ of the underground reservoir of the mine to be measured, and calculate the storage capacity of the underground reservoir of the mine to be measured. Water volume V ₃ =S ₂ ×H ₂ ×R. It can be known from the measurement that the reservoir area S ₂ of the underground reservoir in the six panel area of the 2-2 coal seam of the Daliuta Mine is 900,000m ² , and the height of the water head H is 1.2m. Therefore, the underground reservoir of the mine can be calculated according to V ₃ =S ₂ ×H ₂ ×R The water storage capacity is 162000m ³ .

The above-described embodiments are only for the purpose of illustrating the present invention, rather than limiting the present invention. Those of ordinary skill in the relevant technical field can also make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the category of the present invention, and the scope of patent protection of the present invention should be defined by each claim.

Claims (6)

1. the storage capacity in a mine groundwater storehouse is determined method, it is characterized in that, described method comprises the steps:

Step is 1.: rock mass strength, coal seam depth of burial, thickness of coal seam and the exploitation size of measuring mine groundwater to be measured storehouse;

Step is 2.: set mine goaf as benchmark mine groundwater storehouse, the rock mass strength in described benchmark mine groundwater storehouse, coal seam depth of burial, thickness of coal seam and exploitation size are consistent with mine groundwater to be measured storehouse;

Step is 3.: the moisture storage capacity V that measures benchmark mine groundwater storehouse ₂, reservoir area S ₁And head H ₁, calculate coefficient of storage R=V ₂/ S ₁H ₁;

Step is 4.: the reservoir volume V that measures mine groundwater to be measured storehouse ₁, calculate the storage capacity V=V in mine groundwater to be measured storehouse ₁* R.

2. the storage capacity in mine groundwater according to claim 1 storehouse is determined method, it is characterized in that, step 3. in, determine the moisture storage capacity V in benchmark mine groundwater storehouse by the water storage that charges and discharge benchmark mine groundwater storehouse ₂

3. the storage capacity in mine groundwater according to claim 1 storehouse is determined method, it is characterized in that, step 4. in, determine reservoir volume V according to the size of mine goaf ₁

4. the storage capacity in mine groundwater according to claim 1 storehouse is determined method, it is characterized in that 5. described method also comprises step: the reservoir area S that measures mine groundwater to be measured storehouse ₂And head H ₂, calculate the moisture storage capacity V in mine groundwater to be measured storehouse ₃=S ₂* H ₂* R.

5. the storage capacity in mine groundwater according to claim 1 storehouse is determined method, it is characterized in that, step 2. in, described benchmark mine groundwater storehouse is mine groundwater storehouse model, and this model has identical rock mass strength, coal seam depth of burial, thickness of coal seam and the exploitation size with described mine groundwater to be measured storehouse.

6. the storage capacity in mine groundwater according to claim 5 storehouse is determined method, it is characterized in that described rock mass strength is the coal seam shatter strength.

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