Prevention and treatment method for coal seam roof separation water

A technology of coal seam roof and layer-separated water accumulation, applied in drainage, safety devices, mining equipment and other directions, can solve the problems of difficult underground construction, complex geological structure, poor control effect, etc., to ensure the ability of drainage equipment and prevent surges. Effects of water inrush accidents

Active Publication Date: 2016-11-09
陕西省煤田地质集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prevent the inrush of water in the separation layer of the coal seam roof, water prevention and control measures such as underground exploration and drainage and water interception have been adopted in the past. The effect is not good, and because the formation and outburst of detached water are dynamic processes, the existing methods cannot monitor the water regime changes in and around the hole in real time

Method used

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  • Prevention and treatment method for coal seam roof separation water
  • Prevention and treatment method for coal seam roof separation water
  • Prevention and treatment method for coal seam roof separation water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] See figure 2 and image 3 The embodiment of the present invention provides a method for preventing and controlling detached water on the roof of the coal seam, which is especially suitable for the prevention and control of water damage on the roof of the coal seam under the conditions of fully mechanized caving mining of deeply buried and thick coal seams under the Cretaceous sandy conglomerate aquifer. The method mainly includes the following steps:

[0029] (1) Determine the coal mining face. After the coal mining face is determined, construct the wind lane 7 and the mechanical transport lane 8 along the mining direction on both sides of the coal mining face, and construct temporary construction in the wind lane 7 and the mechanical transport lane 8. Water tank 4, then the construction face cuts eye a.

[0030] (2) Calculate the initial closing position c of the coal seam roof abscission layer and the periodic closing position d of the abscission layer.

[0031] A...

Embodiment 2

[0035] On the basis of Example 1, please refer to figure 2 , image 3 as well as Figure 4 , the ground straight-through type weep hole is divided into the first section weep hole and the second section weep hole, the diameter of the first section weep hole is greater than the diameter of the second section weep hole. Due to the great depth of the overburden of the coal seam, it is necessary to place pipes hundreds of meters downward. In order to facilitate the construction of the pipes and the processing of the holes, the holes are set as variable-diameter holes. The hole wall of the first section of the drain hole is provided with a casing 6, which has the effect of reinforcement and prevents the soil layer from blocking the through hole. The hole wall of the second section of the drain hole is provided with flower tubes 5 .

Embodiment 3

[0037] On the basis of Example 1, such as figure 2 As shown, combined with the judgment of the detachment layer development level of the coal mining face, the mechanical analysis of the duration of the abscission layer, and the dynamic mechanism analysis of the formation of the abscission water inrush channel, it is known that the distance from the cutting eye a300 to 350m of the working face is The first closed position of the abscission layer, and then the periodic breaking distance is 150-170m. With the closed position of the abscission layer, the position of the ground through-type scupper can be determined.

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Abstract

The invention relates to the field of coal exploitation, in particular to a prevention and treatment method for coal seam roof separation water. According to the method, in the process of advancing of a work face of a coal seam, a plurality of ground straight-through type water draining holes are formed from the ground to the coal seam, and full-hole penetrating of the straight-through type water draining holes is completed before the work face advances to the position 50 m away from the ground straight-through type water draining holes; and upper openings of the ground straight-through type water draining holes communicate with the ground, and final hole positions should completely exceed a fissure zone and extend to a caving zone, so that the separation water can be drained effectively. Surging disasters of the accumulated separation water can be effectively prevented, intra-hole overlying stratum deformation dynamic observation, fissure zone searching, underground water dynamic monitoring and the like can be carried out, the problem of the accumulated separation water is solved, the capacity of water draining equipment is guaranteed, and an emergency working function is achieved.

Description

technical field [0001] The invention relates to the field of coal mining, in particular to a method for preventing and controlling abscission water on the roof of a coal seam. Background technique [0002] Coal seam roof detachment water damage is a roof collapse and water flooding accident that occurs under specific mining technical conditions in the stope. Its formation mechanism has not been systematically analyzed and studied, and key technologies for the prevention and control of such water damage are lacking. Especially in the fully-mechanized caving mining process, water inrush accidents on the roof frequently occur, causing heavy property losses and personal casualties, and seriously threatening mine production safety. [0003] like figure 1 As shown, the formation mechanism of abscission water is as follows: as the coal seam working face advances, the coal seam roof subsides, bends, ruptures, and collapses, and above the coal seam E, caving zone A, fissure zone B, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F16/00
CPCE21F16/00
Inventor 吕广罗张建新张勇
Owner 陕西省煤田地质集团有限公司
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