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Method for preventing and controlling water inrush in mined-out collapse area through sill-pillar-free caving method

A caving method and no bottom pillar technology, applied in drainage, mining equipment, earthwork drilling and mining, etc., can solve problems such as water inrush and flooding of wells, unsatisfactory plans, and changes in mining working faces

Pending Publication Date: 2021-05-18
NANJING MEISHAN METALLURGY DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The subsidence of the surface changes the water permeability of the surrounding rock above the ore body, and becomes a skylight for the surface precipitation to enter the underground. With the expansion of the surface subsidence range and the increase of the catchment area, a large amount of surface rainfall catchment enters the underground through the subsidence pit in a short period of time, which is easy to cause In order to solve the above-mentioned technical problems in the accident of water flooding in the mining face, those skilled in the art are constantly trying new solutions, but none of the existing technical solutions is ideal.

Method used

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  • Method for preventing and controlling water inrush in mined-out collapse area through sill-pillar-free caving method
  • Method for preventing and controlling water inrush in mined-out collapse area through sill-pillar-free caving method
  • Method for preventing and controlling water inrush in mined-out collapse area through sill-pillar-free caving method

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Embodiment 1

[0035] Embodiment 1: see figure 1 , figure 2 , a method for preventing and controlling water inrush in a goaf subsidence area by a bottomless pillar caving method, said method comprising the following steps:

[0036]Step 1: Use the Surpac 3D modeling software to establish the underground goaf area model and the original surface DTM model of the surface subsidence for less than 10 years, and then drop the subsidence boundary lines at different times on the original surface DTM model to obtain the subsidence of different years Boundary 3D model.

[0037] Step 2: Determine the central axis of the collapse; take the graphic center of the plane projection of the surface collapse boundary line as the plane projection point of the collapse center, and obtain the plane coordinates of the collapse central axis after converting the ACAD graphics of the collapse boundary line into a line file in the SURPAC environment , use SURPAC software line file to create the center point function...

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Abstract

The invention relates to a method for preventing and controlling water inrush in a mined-out collapse area by a sill-pillar-free caving method, which comprises the following steps of: determining a dynamic numerical relationship between surface collapse and underground mining, a maximum infiltration parameter of a rainstorm day and a channel for transporting surface rainfall and catchment into an underground through a collapse pit; the maximum daily water inflow of surface rainfall catchment entering the underground through a collapse pit can be reasonably predicted, effective closure is carried out above the stoping ore extraction operation level, most of goaf water is introduced into a main drainage system, and underground water disaster accidents are prevented.

Description

technical field [0001] The invention relates to a method, in particular to a method for preventing and controlling water inrush in a goaf subsidence area by a bottomless pillar caving method, and belongs to the technical field of mine surface subsidence treatment. Background technique [0002] Pillarless segmental caving method is to carry out end extrusion blasting and ore drawing under the overburden, the overburden will drop with the release of the end ore, and then a void will be created on the upper part of the overburden. The falling and exposed area gradually expands. When the tensile stress in the center of the roof exceeds the tensile strength of the rock, the rock is destroyed, and the roof immediately begins to collapse. With continuous mining, the caving continues to spread to the surface, resulting in The ground collapsed. The subsidence of the surface changes the water permeability of the surrounding rock above the ore body, and becomes a skylight for the surf...

Claims

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Application Information

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IPC IPC(8): G06F30/20E21F16/00G06F111/10
CPCE21F16/00
Inventor 于志香吴荣高邱海涛钱小峰刘志佳
Owner NANJING MEISHAN METALLURGY DEV
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