A support method for strong beams such as the roof of a rectangular roadway in a coal mine
A technology of roadway roof and roof, applied in tunnels, mining equipment, earthwork drilling and other directions, can solve problems such as lack of supporting methods, and achieve the effects of good supporting effect, simple construction and improved use of anchor cables
Active Publication Date: 2019-10-29
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology
[0006] The purpose of the present invention is to solve the problem of the lack of a reasonable and effective support method in roadway roof support, and provide a roadway roof and other strong beam support method for targeted support according to the stress characteristics of the roof
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[0028] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0029] The core of the present invention is based on the force characteristics of the roof of the roadway, and on the premise of ensuring the stability of the roof of the roadway, it provides a strong beam support method such as the roof of the roadway, which reduces the use of supporting materials on the basis of effectively controlling the stability of the roof , thereby reducing support costs.
[0030] Concrete steps of the present invention are as follows:
[0031] 1) Excavating the roadway (2) of the current construction section according to the actual geological conditions of the coal mine,
[0032] 2) Obtain the mechanical parameters of the roof surrounding rock of the roadway (2) and the size of the roadway (2). Rock samples are selected from the roof strata of the currently excavated roadway (2), and laboratory tests are carried o...
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The invention discloses a support method for roof uniform strength beams of a coal mine rectangular roadway, and relates to the technical field of coal mine roadway support. The support method comprises the following steps that 1, a roadway is excavated according to the actual geological conditions of coal mines; 2, mechanical parameters of roadway roof surrounding rocks and the size of the roadway are obtained; 3, anchor parameters are determined, specifically, according to the obtained mechanical parameters of the surrounding rocks and the size of the roadway, based on the force analysis ofa roof, anchor bolt parameters required for the uniform strength beams at different positions of the roof are determined pointedly according to the stress characteristics of the roof; 4, anchor cableparameters are determined, specifically, a natural equilibrium arch equation of the roadway roof is determined according to PU's equilibrium arch theories, and anchor cable parameters for supporting the uniform strength beams at different positions of the roof are determined base on the height of a natural equilibrium arch; 5, a support scheme of the uniform strength beams of the roadway roof is determined; and 6, support construction of the uniform strength beams of the roadway roof is carried out. The support method for the roof uniform strength beams of the coal mine rectangular roadway hasthe advantages that support parameters are reasonable, the construction is simple, and the support effect is good; low investment costs, security and reliability, and simple construction are achievedon the premise of stable support. The support method for the roof uniform strength beams of the coal mine rectangular roadway has extensive application value.
Description
technical field [0001] The invention relates to a roadway support method in a coal mine, in particular to a strong beam support method such as a roof of a rectangular roadway in a coal mine. Background technique [0002] my country is a country "rich in coal, poor in oil, and low in gas". Among them, coal accounts for 92% of my country's energy reserves, oil accounts for 2.9%, natural gas accounts for 0.2%, and hydropower accounts for 4.7%. In recent years, my country's coal consumption and production has been maintained at about 70% of the country's primary energy production, and has always been in the dominant position. It can be seen that coal plays a decisive role in the construction of the national economy, and the basic position of the coal industry in the national economy will be long-term, stable and irreplaceable. [0003] There are few open-pit coal mines in my country, and the mining of coal resources is mainly based on underground mining. Underground coal mining...
Claims
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IPC IPC(8): E21D11/00
CPCE21D11/006
Inventor 左建平文金浩胡顺银
Owner CHINA UNIV OF MINING & TECH (BEIJING)