張家峁煤礦綜采工作面礦壓規(guī)律研究

摘  要
張家峁煤礦地處神府侏羅紀煤田地方開采區(qū)的邊界地帶，屬于淺埋厚煤層。淺埋厚煤層礦井綜采面礦壓顯現(xiàn)在礦井開采初期尤其突出，嚴重影響工作面的安全生產(chǎn)，因此有必要對張家峁礦15203綜采面礦壓規(guī)律進行研究。
本文以神木張家峁煤礦綜采工作面礦壓顯現(xiàn)為背景，采用工程調(diào)查、現(xiàn)場監(jiān)測數(shù)據(jù)采集和理論分析等方法。對張家峁礦15203綜采面礦壓規(guī)律進行了研究。
15203綜采面現(xiàn)場觀測、工程調(diào)查和理論分析得出老頂初次來壓步距為54m。周期來壓步距為15.6m左右；周期來壓期間支架平均工作阻力達44.48MPa，非周期來壓期間之際平均工作阻力約30.65MPa，來壓強烈，持續(xù)時間短，工作面中部測區(qū)有65%支架安全閥開啟，說明支架額定工作阻力富裕系數(shù)并不大。順槽超前支護20m能夠滿足護巷要求，工作面之間20m護巷煤柱可以滿足要求。
關 鍵 詞：淺埋煤層；綜采面礦壓規(guī)律；

Subject:Analyses of the Mine Pressure Law of the Face with Fully Mechanized Coal Mining in Zhangjiamao Coal Mine
           
ABSTRACT
Zhangjiamao coal mine is placed in the boader of Shenfu Jurassic coal field in which thick-shallow coal seam is beared. Mine pressure behavior occours frequently in the initial mining stage which seriously influences the safty in the coal face, thus, it is of great necessity to enforce a research of the mine pressure law of the 15203 fully mechanized coal mining face.
The paper took the mine pressure behavior in the fully mechanized coal mining face of Zhangjiamao mine in Shenmu as the background and adopted engineering investigating、field supervision data collecting、theory analyzing and other method to proceed a research of the mine pressure behavior in the face of Zhangjiamao mine.
According to the field observation、engineering investigation and theory anlysis, the length of the frist weighting interval is 54m. The length of periodical weighting interval is about 15.6m. The average working pressure of the support during the periodical weighting period is 44.48MPa and it is about 33.6 mPa ot during periodical weighting period.The pressure, whcih severely occurs, lasts for a short time. And 65% of the safety valves of the supports become open which suggests that the extra coefficients of rated working pressure of the supports are not very high. The requirement can be met with 20m advancing support of the gate way and 20m thick coal pillar between working faces.
Key Words: shallow coal seam         Law of the Face with Fully Mechanized Coal Mining 

 
目  錄
1 緒論 1
1.1 問題的提出 1
1.2 研究目的及意義 1
1.3 淺埋煤層礦壓研究現(xiàn)狀 1
1.4 研究內(nèi)容和技術路線 3
1.4.1 研究內(nèi)容 3
1.4.2 研究技術路線 3
2 張家峁15203綜采工作面開采條件分析 4
2.1 張家峁煤礦15203綜采面概況 4
2.2 15203綜采面礦壓觀測 5
3 20115綜采工作面礦壓規(guī)律分析 6
3.1 初次來壓 6
3.2 周期來壓 7
4 結(jié)論 11
致  謝 12
參考文獻 13