【摘要】：甘肅華能華亭煤業(yè)集團(tuán)有限責(zé)任公司東峽煤礦37220工作面煤層厚、傾角大、易燃、煤層結(jié)構(gòu)復(fù)雜,若采用水平分段放頂煤法工作面有效長(zhǎng)度短,生產(chǎn)能力小,單產(chǎn)低,萬(wàn)噸掘進(jìn)率高,煤炭回收率低,經(jīng)濟(jì)效益差。為使礦井達(dá)到高產(chǎn)高效,對(duì)工作面綜放技術(shù)進(jìn)行了研究。經(jīng)過(guò)理論分析,結(jié)合物理相似模擬實(shí)驗(yàn)、礦壓與頂煤運(yùn)移觀測(cè)及現(xiàn)場(chǎng)試驗(yàn)對(duì)東峽煤礦37220大傾角特厚煤層工作面走向長(zhǎng)壁分層綜放技術(shù)進(jìn)行研究。研究結(jié)果表明:上分層工作面平均周期來(lái)壓步距大于下分層工作面,上分層來(lái)壓的時(shí)序性為先下部、次中部、后上部,下分層來(lái)壓時(shí)序?yàn)橄戎胁�、次上部、后下�?且下分層支架工作阻力普遍大于上分層。隨著工作面的推進(jìn),上下分層工作面煤層在法線和傾斜方向上,上部頂煤移動(dòng)速率和移動(dòng)量一般大于下部頂煤。自上而下放煤時(shí),會(huì)出現(xiàn)雙漏斗和放煤量的波浪性變化,對(duì)傾斜下方煤巖層影響很小;自下而上放煤不會(huì)出現(xiàn)雙漏斗,對(duì)傾斜上方煤巖層影響范圍很大。橢球體、放煤漏斗與巖層運(yùn)移軌跡長(zhǎng)軸線始終是一條鉛垂線。大傾角煤層放頂煤開(kāi)采過(guò)程中移架、放煤、支架間頂煤漏冒等造成支架頂梁不能接頂、甚至空頂,造成支架傾倒、下滑、尾部偏斜下擺。通過(guò)研究,最終確定東峽煤礦37220大傾角特厚煤層上下分層工作面采用兩采一放(放煤步距1.2m)、自上而下多輪放煤的工藝。現(xiàn)場(chǎng)試驗(yàn)表明,下分層工作面頂煤回采率高于上分層工作面,并取得了良好的經(jīng)濟(jì)效益。同時(shí),為防止該工作面出現(xiàn)飛矸傷人事故,根據(jù)工作面實(shí)際情況提出了相應(yīng)防護(hù)措施,安全效果顯著。
[Abstract]:The coal seam in 37220 face of Dongxia Coal Mine is thick, inclined, flammable and complicated. If the coal face with horizontal sublevel caving method is adopted, the effective length is short, the production capacity is small, and the unit yield is low, if the coal face of Huaneng Huating Coal Industry Group Co., Ltd., Gansu Huaneng Huating Coal Industry Group Ltd. The tunneling rate of ten thousand tons is high, the recovery rate of coal is low, and the economic benefit is poor. In order to achieve high production and high efficiency, the fully mechanized caving technology in coal face was studied. Through theoretical analysis, combined with physical similarity simulation experiment, observation of mine pressure and top coal migration, and field test, the technology of longwall stratified fully mechanized caving working face with 37220 large dip angle and extra thick coal seam in Dongxia Coal Mine is studied. The results show that the average interval of the upper stratification face is larger than that of the lower layer working face, the timing of the upper stratification pressure is the first lower part, the second middle part, the second upper part, the lower upper part, the first middle part, the second upper part, and the second lower part. And the working resistance of the lower layer bracket is generally higher than that of the upper layer. With the advance of the working face, the upper top coal moving rate and movement amount are generally larger than the lower top coal in normal line and inclined direction. When caving from top to bottom, there will be wavy changes of double funnel and coal discharge amount, which has little influence on coal and rock strata below the inclination, but it will not appear double funnel from bottom to top of coal drawing, and has a great influence on coal and rock strata above inclination. The long axis of ellipsoid, coal drawing funnel and strata migration track is always a lead vertical line. In the process of caving coal mining in large inclined coal seam, the roof beam can not be connected with the roof, even the roof is empty, which causes the support toppling, sliding, tail deflection and so on. Through the research, it is finally determined that the top and bottom coal seam of Dongxia coal mine will adopt the technology of two mining and one caving (1.2m distance between coal caving) and multi-wheel caving from top to bottom. The field test shows that the top coal recovery rate of the lower stratified working face is higher than that of the upper stratified working face, and good economic benefits have been obtained. At the same time, in order to prevent the gangue from harming people, the corresponding protective measures are put forward according to the actual situation of the working face, and the safety effect is remarkable.
【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】：2015
【分類號(hào)】：TD823.21

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 伍永平;劉孔智;，

本文編號(hào)：2371659