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Full-area rapid dredging and descending method after underground curtain closure

An all-area, curtain technology, applied in underground chambers, earthwork drilling, safety devices, etc., can solve the problem of low dredging efficiency, difficult dredging of aquifers in water storage media, and inability to meet rapid and safe dredging in the whole area And other issues

Active Publication Date: 2021-05-28
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a rapid dredging method for the whole area after the closure of the underground curtain, which solves the complex occurrence conditions and the difficulty of dredging the aquifer of the water storage medium after the curtain closure. , safety and other issues

Method used

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  • Full-area rapid dredging and descending method after underground curtain closure
  • Full-area rapid dredging and descending method after underground curtain closure
  • Full-area rapid dredging and descending method after underground curtain closure

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Embodiment

[0053] Step 1: See figure 2 and image 3, according to the aquifer 13 and the actual conditions up and down the well, arrange the ground drainage holes 3, connect the aquifer 13 and the downhole drainage system, and perform centralized drainage of the aquifer 13, specifically, the following sub-steps may be included:

[0054] Step 1.1: According to the location of the underground roadway 1, select the position of the ground straight dredging hole 3, and the distance from the target roadway plane is 5-10m;

[0055] Step 1.2: Construction starts from the ground surface to above the aquifer 13, runs the casing and cements the well, completes the water stop and conducts the pressure test until it is qualified;

[0056] Step 1.3: Construct the second casing to 15m below the floor level of the target roadway 1, and lower the second casing, which is a flying tube, which overlaps with the first casing by 20m; the second casing includes the flowers of the 13th section of the aquifer....

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Abstract

The invention discloses a full-area rapid dredging and descending method after underground curtain closure. The method comprises the steps that centralized dredging and descending are conducted on a water-bearing stratum through ground straight dredging holes, and if the dredging and descending requirement cannot be met, the deep portion of the water-bearing stratum is dredged and descended through underground deep dredging and descending inclined holes; then, before mining area tunneling, the dredging and descending effect of a mining area is subjected to area inspection through underground bedding verification holes; and finally, before working face stoping, the water-bearing stratum of a working face top plate is accurately inspected through dense dredging and descending inclined holes, and curtain seepage water passing is intercepted and dredged through curtain intercepting drill holes. According to the method, according to the occurrence condition, hydrogeological characteristics, coal seam excavation design and the like of the water-bearing stratum, multiple dredging and descending modes and means are utilized for different areas and assist and combine with one another, and full-area rapid dredging and descending of the water-bearing stratum after curtain closure are achieved.

Description

technical field [0001] The invention belongs to the technical field of mine water disaster prevention and control, and in particular relates to a method for rapid dredging of the whole area after underground curtain closure. Background technique [0002] Coal, as the main energy source in our country, plays a pivotal role in our country's energy security. As one of the five major associated disasters, coal mine water damage has seriously restricted the sustainable development of the coal industry. For the prevention and control of water hazards on the roof with strong water enrichment and strong recharge, the traditional method of dredging and reducing pressure cannot radically solve the problem of water damage, and at the same time it will inevitably cause waste and pollution of water resources. Mine water prevention and control workers pioneered the development of mine curtain grouting technology, and proposed a comprehensive water prevention and control technology of curt...

Claims

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Application Information

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IPC IPC(8): E21F16/00E21D11/38
CPCE21F16/00E21D11/38
Inventor 姬亚东郑士田葛春贵石志远倪建明陈贵朱慎刚江波王举文
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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