本文選題：黃土溝壑區(qū)　切入點(diǎn)：淺埋近距離煤層　出處：《西安科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：在黃土溝壑區(qū)下進(jìn)行煤層開采,地表移動(dòng)變形規(guī)律將隨黃土溝壑區(qū)坡體穩(wěn)定性的變化而改變,地表甚至產(chǎn)生一系列的地質(zhì)災(zāi)害,若進(jìn)行近距離煤層群開采,地表移動(dòng)變形規(guī)律則顯得更為復(fù)雜。因此,開展黃土溝壑區(qū)下淺埋近距離煤層群開采的地表移動(dòng)變形規(guī)律,對(duì)實(shí)現(xiàn)黃土溝壑區(qū)淺埋煤層礦井安全生產(chǎn)、地面災(zāi)害防治和生態(tài)環(huán)境保護(hù)均具有重要意義。論文以陜北榆神府礦區(qū)為背景,以檸條塔煤礦為研究對(duì)象,結(jié)合檸條塔煤礦N1114和N1206工作面地表移動(dòng)變形觀測(cè)數(shù)據(jù),分析了該區(qū)域的地表移動(dòng)變形規(guī)律,同時(shí)借助FLAC3D數(shù)值模擬軟件,分析了淺埋條件下的近距離煤層群重復(fù)采動(dòng)及溝壑坡體對(duì)地表移動(dòng)變形的影響,主要結(jié)論如下:⑴給出了檸條塔煤礦近距離煤層群開采的各個(gè)角量值,并結(jié)合該煤礦地表移動(dòng)變形規(guī)律,分析了影響黃土溝壑區(qū)地表移動(dòng)變形的主要因素;⑵應(yīng)用FLAC3D數(shù)值模擬,分析了單一煤層、近距離煤層群重復(fù)采動(dòng)及順坡和逆坡開采時(shí)地表移動(dòng)變形規(guī)律,通過對(duì)比分析,給出了淺埋條件下近距離煤層群重復(fù)采動(dòng)及黃土溝壑區(qū)坡體穩(wěn)定性對(duì)地表移動(dòng)變形規(guī)律的影響;⑶應(yīng)用概率積分預(yù)計(jì)理論,結(jié)合計(jì)算機(jī)反演模擬,對(duì)下沉系數(shù)等概率積分預(yù)計(jì)參數(shù)進(jìn)行了修正,并給出了一種黃土溝壑區(qū)下近距離煤層群開采地表下沉系數(shù)的確定方法;結(jié)合黃土溝壑區(qū)坡體的穩(wěn)定性分析,給出了黃土溝壑區(qū)下淺埋近距離煤層群開采的地表移動(dòng)變形規(guī)律,為該采礦地質(zhì)條件下的煤炭綠色開采、地面災(zāi)害防治和可持續(xù)發(fā)展提供科學(xué)依據(jù)。
[Abstract]:When coal seam is mined in loess gully area, the law of surface movement and deformation will change with the change of slope stability in loess gully region, and even a series of geological disasters will occur on the surface. The law of ground surface movement and deformation is more complicated, therefore, the law of surface movement and deformation of shallow buried coal seam group mining in loess gully area can realize the safety production of shallow buried coal seam mine in loess gully area. Ground disaster prevention and ecological environment protection are of great significance. This paper takes Yushenfu mining area in northern Shaanxi as background, takes Caragana coal mine as research object, and combines the observation data of surface movement and deformation of Caragana coal mine N1114 and N1206 working face. The law of surface movement and deformation in this area is analyzed. At the same time, with the help of FLAC3D numerical simulation software, the effects of repeated mining of short distance coal seam groups and gully slope body on surface movement and deformation under shallow burial condition are analyzed. The main conclusions are as follows: (1) the angle values of close distance coal seam group mining in Caragana tower coal mine are given. Combined with the law of surface movement and deformation in this coal mine, the main factors influencing the surface movement and deformation in loess gully area are analyzed. 2. The numerical simulation of FLAC3D is applied to analyze the main factors affecting the surface movement and deformation in loess gully area. This paper analyzes the law of surface movement and deformation in single coal seam, short distance coal seam group and mining along slope and inverse slope, and through comparative analysis, The effects of repeated mining of short distance coal seams and stability of slope body in loess gully region on surface movement and deformation under shallow burying condition are given. The probability integral prediction theory is applied to the simulation by computer inversion. The prediction parameters of probability integral such as subsidence coefficient are modified, and a method to determine the subsidence coefficient of coal seam group mining in loess gully region is given, and the stability analysis of slope body in loess gully region is also given. The law of surface movement and deformation of shallow buried near distance coal seams mining in loess gully region is given, which provides scientific basis for green coal mining, ground disaster prevention and sustainable development under this mining geological condition.
【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)】：TD325

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本文編號(hào)：1603098