20春学期《爆破工程Ⅰ》在线平时作业3

adminhan

<div>&nbsp;井下爆破装药前必须清除炮眼内的煤粉或岩粉，再用木质或竹质炮棍将药卷轻轻推入，不得冲撞或捣实。炮眼内的各药卷必须彼此（）。</div>
A:<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">有<span lang="EN-US">5</span>厘米以上间距</span>
B:<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">有<span lang="EN-US">5</span>厘米以下间距 </span>
C:<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">用封泥隔开</span>
D:<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">密接</span>

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">爆破地点附近<st1:chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="20" unitname="m"><span lang="EN-US">20m</span></st1:chmetcnv>以内风流中的瓦斯浓度达到（ ）时，严禁爆破。</span>
A:2.0％&nbsp;&nbsp;
B:<span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">1.5</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">％ </span>
C:&nbsp;<span>1％</span>
D:<div>0.5％</div>

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">《爆破安全规程》规定：在杂散电流大于（ ）的工作面不应采用普通电雷管起爆。</span>
A:<span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">10mA </span>
B:<span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><span style="mso-spacerun: yes">&nbsp;</span>20mA </span>
C:&nbsp;&nbsp;<span>30mA </span>
D:<span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">40mA</span>

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">在高瓦斯矿井爆破时，都应采用（ ）。</span>
A:反向起爆<span>&nbsp;</span>
B:<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">正向起爆 </span>
C:<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">无填塞炮泥 </span>
D:<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">非电导爆管起爆</span>

<div>在有瓦斯矿井爆破时，要选用与瓦斯等级相应的煤矿许用爆破器材<span>,其起爆总延期时间不得超过（ ）。</span></div>
A:100ms&nbsp;
B:130ms&nbsp;
C:<span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">1000ms </span>
D:<div>1300ms</div>

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">当空气中甲烷浓度为<span lang="EN-US">9.5</span>％和含氧量为<span lang="EN-US">19</span>％时，正是瓦斯完全燃烧所需要的氧量，在该种条件下瓦斯极易引爆，而且爆炸威力最大。</span>
A:错误
B:正确

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">井下采煤爆破可以对炮孔不堵塞。</span>
A:错误
B:正确

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">瓦斯爆炸必须具备三个条件：即一定浓度的甲烷、一定温度的引火源和一定浓度的氧气。</span>
A:错误
B:正确

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">炸药爆炸的爆温和爆热愈大，引燃瓦斯的可能性也愈大。</span>
A:错误
B:正确

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">爆破母线和连接线、电雷管脚线和连接线、脚线和脚线之间的接头必须相互扭紧并悬挂，不得与轨道、金属管、金属网、钢丝绳、刮板输送机等导电体相接触。</span>
A:错误
B:正确

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">当采掘工作面风流中瓦斯浓度达到<span lang="EN-US">l</span>％时，应停止用煤电钻打眼。</span>
A:错误
B:正确

&nbsp;外来电流是引发电起爆网路早爆的主要因素。
A:错误
B:正确

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">马头门的爆破应遵循<span lang="EN-US">&ldquo;</span>少钻眼，多装药<span lang="EN-US">&rdquo;</span>的原则。</span>
A:错误
B:正确

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">采掘工作面使用的爆破器材，要选用与瓦斯等级相应的煤矿许用爆破器材<span lang="EN-US">,</span>其起爆总延期时间不得超过<span lang="EN-US">1000ms </span>。</span>
A:错误
B:正确

&nbsp;煤矿井下爆破网路接线前要切断工作面<span>(作业现场)电源，改用矿灯或电压不高于36V的照明器材。</span>
A:错误
B:正确

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">毫秒爆破不能改善岩石破碎质量，爆破效果较差，不能减少在围岩内产生的振动。</span>
A:错误
B:正确

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">从成束的电雷管中抽取单个电雷管时，可以手拉脚线硬拽管体，也可以手拉管体硬拽脚线。</span>
A:错误
B:正确

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">煤的可燃挥发分含量越高，煤尘越容易发生爆炸，爆炸威力也越大。</span>
A:错误
B:正确

&nbsp;电起爆网路导致拒爆总的原因是未能保证网路中每个雷管流过的电流达到额定值。
A:错误
B:正确

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">当瓦斯与空气的混合气体被爆破产生的冲击波压缩时，会引起压力和温度急剧下降。</span>
A:错误
B:正确