圆弧拱巷道断面的设计.docx

10级采矿工程专业《井巷工程》课程设计说明书学 号：120100201172姓 名：兰 伟 东班 级：采矿（2）班 指导老师：张 海 峰 设计成绩：设计时间:2012-12-24 目录1.巷道断面形状选择···········································32.巷道净断面尺寸·············································31）确定巷道净宽度············································32）确定拱高·················································33）确定壁高·················································44）确定巷道净断面积S和净周长P·······························65）用风速校核巷道净断面积·····································66）选择支护参数···············································67）选择到床参数·················································63.布置管道内水沟和管缆·········································74.计算巷道掘进工程量及材料消耗量······························95.绘制巷道断面施工图，编制巷道特征表和巷道工程量及材料消耗量表·106.设计心得····················································117.参考文献····················································12题目某煤矿年设计生产能力500万t/a，低瓦斯矿井，最大涌水量300/h。通过运输大巷涌水量为140/h，采用ZK14—9/550架线电机车牵引5.0t底卸式矿车运输，大巷围岩稳定（f=4.5），大巷通风量为92/s巷道内敷设一趟=220mm的压风管和一趟=150mm的供水管。采用圆弧拱形断面。一.选择合适的巷道断面形状。年产500万吨矿井的运输大巷，一般服务年限在25年以上，采用900mm轨距双轨运输的大巷，穿过稳定岩层（f=4.5），故选用价格低廉，质量轻，锚固力大的玻璃钢锚杆与喷射混凝土支护，圆弧拱形断面。二.设计双轨直线段的巷道断面。（一）确定巷道净宽度B查表2.2可知ZK14—9/550电机车宽A1=1335mm、高h=1550mm，5t底卸式矿车宽1520mm、高1550mm。根据《煤矿安全规程》，取巷道人行道宽c=1000mm、非人行道一侧宽a=500mm。又查表2.3知该双轨中线距b=1800mm，则两电机车之间距离该距离大于《煤矿安全规程》所规定的两列对开电机车对开安全间隙0.2m，故巷道净宽B=4800mm（二）确定巷道拱高h0圆弧拱形巷道拱高：圆弧拱形巷道半径R取B=4800mm由《采矿工程师手册》5—27查得当=时，R=0.541667B，R=0.5416674800mm=2600mm（三）确定巷道壁高h31.按架线式电机车导电弓子确定h3由表2.3中半圆拱形巷道壁高公式得：h4——轨面起电机车架线高度，按《煤矿安全规程》取h4=2000mm；hc——道床总高度。查表2.9选用30kg/m钢轨，再查表2.11得hc=410mm，道碴高度hb=220mm；n——导电弓子距拱壁安全间距，取n=300mm；K——导电弓子宽度之半，K=718/2=359，取K=360mm；b1——轨道中线与巷道中线间距2410mm+1000mm1652mm1758mm2.按管道装设要求确定式中——道碴面至管子底高度，按《煤矿安全规程》取=1800mm；——管子悬吊件总高度，取＝900mm;由表2.11取=220mm；m——导电弓子距管子间距，取m=300mm；D——压气管法兰盘直径，D=335mm——轨道中线与巷道中线间距，1773mm3.按人行高度要求确定式中为距离巷道壁的距离。距墙壁处的巷道有效高度不小于1800mm。100mm，一般取=200mm。2020mm综上计算，并考虑一定的余量、确定本巷道壁高度为2100mm。则巷道高度按0.1m进级原则，取H=3500mm（四）确定巷道净断面积和净周长由表2.6公式得净断面积式中——道碴面以上巷道壁高，则净周长（五）用风速校核巷道净断面积查表2.8可知vmax=8m/s，已知通过大巷风量最大值Q=92/s代入