【摘要】：本文以府谷沙溝岔煤礦地質(zhì)資料為依據(jù),利用經(jīng)驗(yàn)公式和數(shù)值模擬方法研究研究區(qū)水裂縫帶發(fā)育規(guī)律。取得如下成果:(1)利用《規(guī)程》和《規(guī)范》中所提出的經(jīng)驗(yàn)公式計(jì)算采場(chǎng)導(dǎo)水裂縫帶發(fā)育高度著較大的差別,一次采全高下《規(guī)范》計(jì)算出的導(dǎo)水裂縫帶發(fā)育高度是《規(guī)程》的2左右。(2)《規(guī)范》計(jì)算結(jié)果和數(shù)值模擬結(jié)果基本接近,《規(guī)程》計(jì)算結(jié)果和數(shù)值模擬結(jié)相差較大。經(jīng)驗(yàn)公式(《規(guī)范》)和數(shù)值模擬方法在府谷沙溝岔煤礦適用。(3)府谷沙溝岔煤礦導(dǎo)水裂縫帶高度隨著煤層采厚的增大而增大,裂采比先隨著層采厚增大而增大,當(dāng)增大到一定值后又隨著煤層采厚增大而減小。煤層采厚小于時(shí),煤層采厚與裂采比呈正相關(guān)關(guān)系,4m時(shí)裂采比達(dá)到最大(26.5);煤層采厚大4m時(shí),裂采比呈波動(dòng)下降,煤層采厚8m時(shí),裂采比已降至18.6。(4)府谷沙溝岔煤礦導(dǎo)水裂縫帶高度隨著工作面的增大而減小,裂采比也隨著工面增大而減小。
[Abstract]:Based on the geological data of Fugu Shagoucha coal mine, the law of the development of water fracture zone in the area is studied by means of empirical formula and numerical simulation method. The results are as follows: (1) using the empirical formulas proposed in "regulations" and "specifications" to calculate the height of the fracture zone of water conduction in the stope, there is a great difference in the height of the development of the fracture zone. The developed height of the water-conducting fracture zone calculated under the first mining height is about 2 of that of the regulation. (2) the calculated results are basically close to the numerical simulation results, and the difference between the calculated results and the numerical simulation results is quite large. Empirical formula (< Specification >) and numerical simulation method are applicable in Fugu Shagoucha Coal Mine. (3) the height of water diversion fracture zone increases with the increase of mining thickness of coal seam, and the ratio of fracture to mining increases with the increase of mining thickness at first. When the coal seam thickness increases to a certain value, it decreases. When the mining thickness of coal seam is smaller than that of coal seam, there is a positive correlation between mining thickness of coal seam and the ratio of split to mining, and the maximum ratio of coal seam mining is reached at 4 m (26.5). When the mining thickness of coal seam is 4 m, the ratio of split to mining decreases, and the ratio of fracture to mining decreases to 18.6when the coal seam thickness is 8 m. (4) the height of water diversion fracture zone of Fugu Shagou Cha coal mine decreases with the increase of working face, and the ratio of fracture to mining decreases with the increase of workface.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD745

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