Study on Roadheader Cutting Load at Different Properties of Coal and Rock

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="13"><hr/></td></tr><tr class="thead"><td align="left" rowspan="2">Three-axis force (N)</td><td align="center" colspan="2"><span style="width: 38.625px;"><svg height="16.6625" id="M63" style="vertical-align:-3.56265pt" version="1.1" viewbox="0 0 38.625 16.6625" width="38.625" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg></span></td><td align="center" colspan="2"><span style="width: 38.625px;"><svg height="16.6625" id="M64" style="vertical-align:-3.56265pt" version="1.1" viewbox="0 0 38.625 16.6625" width="38.625" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,12.162)"><path d="M619 670q0 -13 -9 -26t-18 -19q-13 -10 -25 2q-36 38 -66 38q-31 0 -54.5 -50t-45.5 -185h120l-20 -31l-107 -12q-23 -138 -57 -293q-27 -122 -55 -184.5t-75 -109.5q-60 -61 -114 -61q-25 0 -47.5 15t-22.5 31q0 17 31 44q11 8 20 -1q10 -11 31 -19t35 -8q26 0 47 19
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</svg></span></td><td align="center" colspan="2"><span style="width: 38.625px;"><svg height="16.6625" id="M65" style="vertical-align:-3.56265pt" version="1.1" viewbox="0 0 38.625 16.6625" width="38.625" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,12.162)"><path d="M619 670q0 -13 -9 -26t-18 -19q-13 -10 -25 2q-36 38 -66 38q-31 0 -54.5 -50t-45.5 -185h120l-20 -31l-107 -12q-23 -138 -57 -293q-27 -122 -55 -184.5t-75 -109.5q-60 -61 -114 -61q-25 0 -47.5 15t-22.5 31q0 17 31 44q11 8 20 -1q10 -11 31 -19t35 -8q26 0 47 19
q34 34 71 253l54 315h-90l-3 12l31 30h70q28 138 90 204q35 37 75 57.5t70 20.5q26 0 45 -14t19 -28z" id="x1D453"></path></g><g transform="matrix(.017,-0,0,-.017,15.684,12.162)"><path d="M535 323h-483v50h483v-50zM535 138h-483v50h483v-50z" id="x3D"></path></g><g transform="matrix(.017,-0,0,-.017,30.388,12.162)"><path d="M153 550l-26 -186q79 31 111 31q90 0 141.5 -51t51.5 -119q0 -93 -89 -166q-85 -69 -173 -71q-32 0 -61.5 11.5t-41.5 23.5q-18 17 -17 34q2 16 22 33q14 9 26 -1q61 -50 124 -50q60 0 93 43.5t33 104.5q0 69 -41.5 110t-121.5 41q-53 0 -102 -20l38 305h286l6 -8
l-26 -65h-233z" id="x35"></path></g>
</svg></span></td><td align="center" colspan="2"><span style="width: 38.625px;"><svg height="16.6625" id="M66" style="vertical-align:-3.56265pt" version="1.1" viewbox="0 0 38.625 16.6625" width="38.625" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,12.162)"><path d="M619 670q0 -13 -9 -26t-18 -19q-13 -10 -25 2q-36 38 -66 38q-31 0 -54.5 -50t-45.5 -185h120l-20 -31l-107 -12q-23 -138 -57 -293q-27 -122 -55 -184.5t-75 -109.5q-60 -61 -114 -61q-25 0 -47.5 15t-22.5 31q0 17 31 44q11 8 20 -1q10 -11 31 -19t35 -8q26 0 47 19
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</svg></span></td><td align="center" colspan="2"><span style="width: 38.625px;"><svg height="16.6625" id="M67" style="vertical-align:-3.56265pt" version="1.1" viewbox="0 0 38.625 16.6625" width="38.625" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,12.162)"><path d="M619 670q0 -13 -9 -26t-18 -19q-13 -10 -25 2q-36 38 -66 38q-31 0 -54.5 -50t-45.5 -185h120l-20 -31l-107 -12q-23 -138 -57 -293q-27 -122 -55 -184.5t-75 -109.5q-60 -61 -114 -61q-25 0 -47.5 15t-22.5 31q0 17 31 44q11 8 20 -1q10 -11 31 -19t35 -8q26 0 47 19
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</svg></span></td><td align="center" colspan="2"><span style="width: 38.625px;"><svg height="16.6625" id="M68" style="vertical-align:-3.56265pt" version="1.1" viewbox="0 0 38.625 16.6625" width="38.625" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,12.162)"><path d="M619 670q0 -13 -9 -26t-18 -19q-13 -10 -25 2q-36 38 -66 38q-31 0 -54.5 -50t-45.5 -185h120l-20 -31l-107 -12q-23 -138 -57 -293q-27 -122 -55 -184.5t-75 -109.5q-60 -61 -114 -61q-25 0 -47.5 15t-22.5 31q0 17 31 44q11 8 20 -1q10 -11 31 -19t35 -8q26 0 47 19
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t98.5 -62.5q61 48 61 124q0 59 -29.5 90t-69.5 31zM248 20q46 0 76.5 33.5t30.5 89.5q0 50 -39 85.5t-110 71.5q-81 -54 -81 -137q0 -67 35.5 -105t87.5 -38z" id="x38"></path></g>
</svg></span></td></tr><tr class="thead"><td align="center">Maximum</td><td align="center">Average</td><td align="center">Maximum</td><td align="center">Average</td><td align="center">Maximum</td><td align="center">Average</td><td align="center">Maximum</td><td align="center">Average</td><td align="center">Maximum</td><td align="center">Average</td><td align="center">Maximum</td><td align="center">Average</td></tr><tr><td class="thead-hr" colspan="13"><hr/></td></tr><tr><td align="left">Cutting resistance</td><td align="center">5392</td><td align="center">1009</td><td align="center">7930</td><td align="center">1310</td><td align="center">10499</td><td align="center">1880</td><td align="center">13677</td><td align="center">2169</td><td align="center">15642</td><td align="center">2487</td><td align="center">19765</td><td align="center">2860</td></tr><tr><td align="left" colspan="13"><hr/></td></tr><tr><td align="left">Traction resistance</td><td align="center">3203</td><td align="center">413</td><td align="center">4578</td><td align="center">495</td><td align="center">6417</td><td align="center">714</td><td align="center">8935</td><td align="center">1198</td><td align="center">12840</td><td align="center">1764</td><td align="center">17643</td><td align="center">2660</td></tr><tr><td align="left" colspan="13"><hr/></td></tr><tr><td align="left">Side resistance</td><td align="center">1150</td><td align="center">275</td><td align="center">1518</td><td align="center">319</td><td align="center">2272</td><td align="center">420</td><td align="center">2620</td><td align="center">512</td><td align="center">3124</td><td align="center">601</td><td align="center">3467</td><td align="center">655</td></tr><tr class="table-tr"><td colspan="13"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Load statistics of cutting process with a single pick.

The Scientific World Journal

tab3

Table 3

Table 3: Study on Roadheader Cutting Load at Different Properties of Coal and Rock 