Determination method for mining-roadway-floor destruction range
A method of determining the method and the technology of the mining roadway, which is applied in the direction of mining equipment, mining equipment, earthwork drilling and mining, etc., and can solve problems such as large amount of engineering repairs, improper selection of design parameters, and inconsistent deformation and failure characteristics.
Active Publication Date: 2017-12-22
XIAN UNIV OF SCI & TECH
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Problems solved by technology
[0010] (1) The theoretical basis adopted is inconsistent with the actual deformation and failure characteristics of the mining roadway floor, and the selection of relevant design parameters is improper;
[0011] (2) The construction of the base plate is difficult, resulting in poor control effect of the base plate and a large amount of repair work;
[0012] (3) The maintenance cost of the roadway is high, which increases the cost, and the normal production of the mine is tense
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[0080] A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.
[0081] Such as figure 1 As shown, the embodiment of the present invention provides a method for determining the damage range of the floor of the mining roadway, including the following steps:
[0082] (1) Establish the damage mechanics model of the roadway floor:
[0083] For the extruded flow bottom-drum roadway, due to the low strength and looseness of the floor rock formation, the roadway floor can be regarded as a rock mass with poor shear, tensile and bending resistance, and the failure mechanics model of the roadway floor can be established (such as figure 2 shown): affected by the uniform load P on the side of the roadway and the uniform load q on the floor, according to the principle of ultimate bearing capacity ...
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The invention discloses a determination method for the mining-roadway-floor destruction range. A roadway-floor destruction mechanical model is established, a method for determining the roadway-floor destruction range is given, and the new technology is provided for reasonable-and-effective supporting scheme selection of a floor-heave mining roadway. The determination method is closely combined with the roadway-floor deformation destruction characteristics, the roadway-floor stability is analyzed by establishing the roadway-floor destruction mechanical model, and a stability criterion is given. A roadway-floor-destruction-range calculation model is established, the roadway-floor destruction range is quantitatively analyzed and determined, and a reference can be provided for reasonable selection of similar mining-roadway supporting schemes.
Description
technical field [0001] The invention relates to the technical field of mining roadway floor, in particular to a method for determining the damage range of the mining roadway floor. Background technique [0002] Most coal mines in my country have entered into deep mining. With the increase of coal seam burial depth (burial depth), under the action of high ground stress, the floor of the roadway has a wide range of plasticity, and the floor is severely heaved, resulting in a large amount of overall deformation of the roadway, which seriously affects the ventilation and transportation of the mine. Threats to safety and normal production have become one of the technical problems to be solved urgently in mining areas. [0003] Quantitative analysis and calculation of the damage range of the backing roadway floor provides a theoretical basis for determining reasonable support parameters, and is a key technology to ensure safe and economical mining in mining areas. [0004] However...
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IPC IPC(8): E21F17/00
CPCE21F17/00
Inventor 黄庆享曹健郝高全
Owner XIAN UNIV OF SCI & TECH