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High initial strength filling mining method

A technology of initial strength and filling coal mining, which is applied in the direction of filling, ground mining, mining equipment, etc., can solve the problems of difficult sources of coal mine filling and mining materials, and achieve the effect of high initial strength, low cost and excellent performance

Inactive Publication Date: 2016-03-02
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the source of materials for urban garbage disposal and coal mine filling and mining is difficult at present, and to use urban garbage as a raw material to propose a method for solidifying garbage and using it as coal mine filling and mining materials

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specific Embodiment

[0027] 1) Pick out and recycle the unbreakable scrap metal in the urban garbage, and use a crusher to crush the remaining part into particles with a particle size of less than 30mm;

[0028] 2) Add a certain amount of curing agent to the crushed garbage particles and stir evenly, then introduce the stirred mixture into a pressing mold to make a filling profile (6) of a certain size, and the strength of the filling profile (6) is not less than that of the mined The strength of the coal seam, after the pressing is completed, the surface is encapsulated, and the pressed leachate is treated separately;

[0029] 3) Filling profile (6) filling in the goaf of the coal mine: first, select the deep shaft longwall coal mining face, the width of the upper entry (2) and lower entry (8) of the deep shaft longwall coal mining face The thickness of the mining coal seam (1) is 3.0m; the prepared filling profile (6) is transported from the ground to the bottom of the well with a cage, and then...

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Abstract

The invention relates to a high initial strength filling mining method. The method includes the following steps: crushing municipal garbage, mixing the garbage with a proportional curing agent and pressing the garbage into a filling material; transporting the prepared sealed filling material from the ground to the bottom of the well, and then shipping the filling material to a working face; after coal cutting, support advancing and pushing on the working face, sending the filling material from a gate top by using a mining flatbed truck, sending the filling material into a flexible rail behind a support through a rotating switch of an upper end, unloading the filling material to a goaf area, stacking regularly, and filling the remaining gap with a rapid hardening cement paste material to ensure complete roof contact; and after mining, sealing the goaf area again through boundary coal pillars and stop line coal pillars to ensure zero gas and liquid exchange between the filled area and the unfilled area. The method of the invention solves the problems of municipal garbage disposal and the sources for mining coal filling material, and the filling material has high initial strength and can effectively control the surface subsidence.

Description

technical field [0001] The invention relates to a coal mine high initial strength solid filling mining method. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, a large amount of urban waste (including stale domestic waste, construction waste, industrial waste, etc., the same below) has been produced, which has become increasingly harmful to human health and the living environment. It has become one of the key issues facing the sustainable development of cities in our country. At present, landfill is still the main way to deal with domestic waste in various countries in the world. Landfill treatment technology faces problems such as site selection, treatment capacity and service life, and landfill is prone to produce secondary disasters such as methane and toxic leachate. Chinese patent CN1583299A discloses a process for treating municipal solid waste. It first crushes domestic solid waste with a crusher, a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16E21F15/06
Inventor 姜福兴朱斯陶
Owner UNIV OF SCI & TECH BEIJING
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