Severo-Zadonsk Experimental Plant


Technical characteristics

Parameters М23.19-40 М23.21-45 М23.24-50 М23.25-55
Section installing pitch, m. 1,75 1,75 1,75 1,75
Quantity of hydraulic props in the section, pcs. 2 2 2 2
Installation height of the section, mm. 1900…4000 2100…4500 2400…5000 2550…5500
Resistivity of the support, kN/m², not less 1050…1250 1050…1250 1050…1250 1050…1250
Section resistance, kN, not less 8400…10250 8400…10250 8400…10250 8400…10250
Average ground pressure, MPa, not more 2,2…2,6 2,2…2,6 2,2…2,6 2,2…2,6
Operating pressure, MPa 45 45 45 45
Section advance pitch, m. 0,8 0,8 0,8 0,8
Section weight, t. 24 26 28 30
The powered support М23 consists of two-props sections with four-chain linking system of the basis with the barrier; the rigid-linked ceiling, equipped with the dual-hinged flap visor for simultaneous roofing support and face keeping. To adjust the section in the seam plane and to protect the workspace under the support against small stuff extension boards and pusher-jack installed onto one side are used in the section. It is possible to reinstall boards and pusher-jack onto another side, also to manage them independently separately from both section sides.
Increased resistance of the support ensures the work in thick seams with hard-caving roofing at the upper limit of their extension range.