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Water retaining method for coal mining process

A groundwater and protective layer technology, applied in surface mining, earthwork drilling, underground mining, etc., can solve problems such as the reduction of water volume in wells, the impact on industrial, agricultural and residential water use, and the decline of groundwater level, so as to improve work efficiency and achieve good practical significance. , the effect of improving safety

Active Publication Date: 2014-07-16
HEBEI COAL SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former causes a lot of waste of groundwater resources, leading to a continuous decline in the regional groundwater level, forming a groundwater sinking funnel
The latter changes the characteristics of the groundwater flow field, often causing the water volume of wells to decrease or even cut off, affecting industrial, agricultural and residential water use.

Method used

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  • Water retaining method for coal mining process
  • Water retaining method for coal mining process
  • Water retaining method for coal mining process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A water retention method used in coal mining process, comprising the steps of:

[0027] 1. Adopt multi-directional advanced detection method of roadway (Patent No. ZL 201110095155.4), multi-parameter space mapping method of roadway advanced detection data (Patent No. .X) to form a stereo detection method ( Figure 4 , 5 ), find out the static groundwater occurrence characteristics in the original state of the underground mining area of ​​the coal mine, find out the distribution of groundwater in multiple directions such as the front, side, front, roof, bottom, and working face roof, bottom, and periphery of the excavation roadway, and the groundwater protection layer Integrity, development of natural aqueducts, etc.

[0028] Carry out all-round and non-destructive exploration of the static occurrence characteristics of groundwater in the mining area, find out the location and scope of the water-rich space in the underground aquifer space, and the development of natura...

Embodiment 2

[0035] 1. Adopt multi-directional advanced detection method of roadway (Patent No. ZL 201110095155.4), multi-parameter space mapping method of roadway advanced detection data (Patent No. .X) to form a stereo detection method ( Figure 4 , 5 ), find out the static groundwater occurrence characteristics in the original state of the underground mining area of ​​the coal mine, find out the distribution of groundwater in multiple directions such as the front, side, front, roof, bottom, and working face roof, bottom, and periphery of the excavation roadway, and the groundwater protection layer Integrity, development of natural aqueducts, etc.

[0036] Carry out all-round and non-destructive exploration of the static occurrence characteristics of groundwater in the mining area, find out the location and scope of the water-rich space in the underground aquifer space, and the development of natural water-conducting channels such as faults and collapse columns, and try not to use drill...

Embodiment 3

[0044] The 2120 working face of a certain mine is a 12# coal driving face, with a designed strike length of 1208m.

[0045] On December 24 of a certain year, water gushed from the bottom plate during the tunneling of the 9# coal 2298 working face on the upper part of the 2120 working face, and the maximum water gushing volume was 172m 3 / h, causing the nearby 2278 working face to be flooded and the entire north wing of the mine to be shut down.

[0046] Thirteen years later, the air duct of the 2120 working face was excavated to a position of 918m. The research team adopted the "multi-directional advanced detection method of roadway" (patent No. ZL 201110095155.4, ZL201110389923.7) to conduct multi-directional and three-dimensional detection of the high water level anomaly area in front of the head.

[0047] figure 2 It is the multi-directional advanced detection project layout drawing of the air duct roadway of the 2120 working face; Figure 3A , Figure 3B yes figure 2...

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Abstract

The invention discloses a water retaining method for a coal mining process, relating to the technical field of an underground mining method. The water retaining method comprises the following steps: firstly, performing three-dimensional probing on underground water static occurrence features, protective layer integrity and natural water diversion channel development state of an underground coal mine excavating region by adopting the three-dimensional probing technique; and secondly, finding a weak section and a water diversion channel in an underground water protective layer and a section with underground water leakage risk by combining the probed result, and rapidly grouting to block the water diversion channel and the section with the underground water leakage risk by drilling rapidly and accurately and grouting to reinforce the underground water protective layer or setting up a water retention coal pillar by adopting underground high-pressure water jet drilling technology. The method can realize protection to groundwater resources in mining districts while ensuring safe and high-efficiency coal mining.

Description

technical field [0001] The invention relates to the technical field of underground mining methods. Background technique [0002] Coal accounts for 70% of my country's primary energy consumption and plays an important role in national economic production. However, the damage to the environment during the coal production process is also very prominent. Problems such as ground subsidence and groundwater resource damage caused by coal mining have attracted more and more attention from all walks of life. [0003] Traditional coal mining technology has always regarded groundwater as a disaster, and measures such as drainage and pressure reduction and grouting treatment have been taken to either drain the groundwater or partially seal the water. The former causes a lot of waste of groundwater resources, leading to a continuous decline in the regional groundwater level, forming a groundwater sinking funnel. The latter changes the characteristics of the groundwater flow field, ofte...

Claims

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Application Information

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IPC IPC(8): E21C41/16
CPCE21C41/16
Inventor 刘建功李玉宝赵立松
Owner HEBEI COAL SCI RES INST
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