浅埋煤层综放工作面支架合理支护强度确定及其应用
Determination and Application of Rational Supporting Strength for Supports in Large Mining Height Fully-mechanized Working Face
-
摘要: 为了研究浅埋煤层综放工作面支架的合理支护强度并分析其矿压特征,以神东某矿12301工作面为例,确定了工作面顶板的类别,通过理论计算按工作面最大采高、支架承受载荷以及动载荷对所选用的型号为ZY11000/25/50的支撑掩护式支架的支护强度进行了分析,并根据支架工作阻力监测数据对支架的应用效果和工作面的顶板活动规律进行了研究。结果表明:工作面所选用的支撑掩护式支架的初撑力统计合格率为62.8%,支架初撑力整体利用率较高,该型号支架能够完全适合支撑顶板。根据支架工作阻力监测数据得到,直接顶初次垮落步距平均12.78 m;基本顶初次来压步距平均66.88 m;整个工作面基本顶周期来压步距最大为67.1 m,最小为11.8 m,周期来压步距平均32.5 m,来压强度缓和;其中,基本顶显著来压期间,来压强度平均为30.0 MPa。确定该支架能够适应该类工作面的顶板活动规律。Abstract: To study the reasonable support strength of fully mechanized caving face supports in shallow coal seam and analyze mine pressure characteristics of working face, taking 12301 working face of Shendong Mine as an example, the types of roof of working face is determined, and according to the maximum mining height of the working face, the bearing load of the support and the dynamic load, the supporting strength of the supporting and sheltering support of the selected type of ZY11000/25/50 is analyzed by theoretical calculation. Research shows that: the statistical qualification rate of the supported shield support used in the working face is 62.8%, and the overall utilization ratio of initial supporting force of support is high. This type of support can be used to support the roof completely. The average initial caving step distance of the direct top was 12.78 m, the average initial pressure step distance of the basic top was 66.88 m; in the whole working face, the maximum and the minimum periodic weighting seeps of basic roof is 67.1 m and 11.8 m respectively, and the average periodic weighting length is 32.5 m, and the strength is moderate. The average strength of basic top pressure of 12301 face is 30.0 MPa. It is determined that the support can adapt to the working face roof movement law.
-
-
[1] 段军,黄宇楠,殷跃.大柳塔煤矿薄基岩综采面矿压规律研究[J].煤,2012,21(1):3-5. [2] 刘江,任艳芳.浅埋深长壁工作面矿压显现规律实测分析[J].煤矿安全,2010,41(2):93-96. [3] 崔廷锋,张东升,范钢伟,等.浅埋煤层大采高工作面矿压显现规律及支架适应性[J].煤炭科学技术,2011, 39(9):25-28. [4] 李政,康天合,黄志明,等.浅埋综放工作面矿压特征及支护强度实测研究[J].煤炭科学技术,2015,43(5):42-45. [5] 吕梦蛟.神东矿区长壁采场矿压显现规律与支架选型[J].煤炭科学技术,2010,38(11):48-52. [6] 杨增夫.徐州矿区“三软”煤层综采放顶煤轻型支架合理性分析[J].煤炭科学技术,2002,30(10):56-58. [7] 孟庆坤.涡北矿大采高综放开采及其液压支架选型[J].煤炭科学技术,2007,35(8):53-54. [8] 倪建明,李桂臣.极破碎顶板松软煤层支架选型及抱采工艺实践[J].煤炭科学技术,2012,40(4):14-17. [9] 佟友.“孤岛”综放工作面液压支架选型设计[J].煤矿开采,2012,17(4):44-46. [10] 司荣军.综放面顶板(顶煤)分类及应用研究[D].青岛:山东科技大学,2004. [11] 于雷,闫少宏,刘全明.特厚煤层综放开采支架工作阻力的确定[J].煤炭学报,2012,37(5):737-742. [12] 闫少宏.综放开采矿压显现规律与支架-围岩关系新认识[J].煤炭科学技术,2013,41(9):96-99. [13] 杜锋,白海波.薄基岩综放采场直接顶结构力学模型分析[J].煤炭学报,2013,38(8):1331-1337. [14] 孔德中,任志成,耿华乐.大采高工作面支架工作阻力的合理确定[J].煤矿安全,2014,45(7):163-165. [15] 孔德中,杨胜利,高林,等.基于煤壁稳定性控制的大采高工作面支架工作阻力确定[J].煤炭学报,2017, 42 (3):590-596.
计量
- 文章访问数: 95
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
