Multi-layer long-wall mining roadway arrangement method for extremely-thick coal seam

A roadway layout and coal seam technology, applied in tunnels, ground mining, mining equipment, etc., can solve the problems of large amount of roadway excavation, low efficiency, and high cost

Inactive Publication Date: 2019-12-31
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] If the mining of extremely thick coal seams adopts the traditional layered mining roadway layout method, there are often problems s...

Method used

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  • Multi-layer long-wall mining roadway arrangement method for extremely-thick coal seam
  • Multi-layer long-wall mining roadway arrangement method for extremely-thick coal seam
  • Multi-layer long-wall mining roadway arrangement method for extremely-thick coal seam

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Embodiment

[0022] Taking a certain mine as an example to introduce a method for arranging roadways for multi-layered longwall mining in extremely thick coal seams according to the present invention, the specific steps are as follows:

[0023] Step 1: According to geological data, the burial depth of a thick coal seam in a certain mine is 312m, and the average coal thickness is 80m. It is a horizontal coal seam with stable occurrence and can be mined in the whole area. Such as image 3 As shown, in the initial mining area, according to the mining technical conditions, the coal seam is divided into 4 layers according to the thickness from top to bottom, the upper 20 m is the top layer, and the middle 40 m is divided into two layers, namely the middle layer , the middle layer continues to be divided into middle layer 1 and middle layer 2 according to the elevation every 20m, and the bottom 20 m is the bottom layer; each layer is divided into 3 sections;

[0024] Step 2: Excavate the auxili...

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Abstract

The invention discloses a multi-layer long-wall mining roadway arrangement method for an extremely-thick coal seam, is mainly used for solving the problems of high roadway tunneling quantity, high maintenance cost and the like if traditional roadway arrangement modes are adopted for mining of extremely-thick coal seams, and belongs to the technical field of coal mining. The method specifically includes the following steps that the extremely-thick coal seam is layered from top to bottom according to the certain thickness, stoping is performed on the layers in the descending sequence, an air return main roadway, an auxiliary transportation main roadway and a transportation main roadway are arranged along the bottom levels of a top layer, a middle layer and a bottom layer respectively, in-seam cross-cuts are dug from the three main roadways or inclined connection roadways for entering of the layers and digging of stoping roadways, and a production system is formed. The three main roadwaysare connected by the aid of the inclined connection roadways, a chute is dug in a centralized transportation roadway connected with section transportation drifts to be connected with a mining area coal bunker, and stoped coal is transported from the chute to the mining area coal bunker and is transported out through the transportation main roadway. With the method, the roadway tunneling quantityis low, efficient auxiliary transportation is facilitated, the resource recovery rate is high, and the method is safe and reliable.

Description

technical field [0001] The invention relates to a roadway layout method for coal mining, in particular to a roadway layout method for multi-layered longwall mining of extremely thick coal seams. Background technique [0002] The center of development of my country's coal resources has shifted from the eastern region, which is on the verge of depletion, to the western region, which is rich in reserves. The typical occurrence of coal seams in the western region, especially in the northwest mining area, is characterized by many extremely thick coal seams. For example, there are extremely thick coal seams with a single layer thickness of more than 200m in Xinjiang. It is an effective way to efficiently mine extremely thick coal seams by adopting the layered mining method and increasing the thickness of the first-time mining coal seam as much as possible. [0003] If the mining of extremely thick coal seams adopts the traditional layered mining roadway layout method, there are o...

Claims

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Application Information

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IPC IPC(8): E21C41/18E21D9/14
CPCE21C41/18E21D9/14
Inventor 王旭锋文杰张东升张炜秦冬冬杨欢常泽超
Owner CHINA UNIV OF MINING & TECH
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