EQUIPMENT FOR ASSESSMENT OF ROOF DISPACEMENT WITHIN THE PRELIMINARY DEVELOPMENT

摘要

FIELD: mining engineering. ^ SUBSTANCE: invention belongs to the mining engineering, more specifically to the equipment for assessment of roof displacement within the preliminary development. Simple construction constitutes an important advantage. Equipment for assessment of roof displacement within the preliminary development consists of a fixed element with an elastic member located inside and moving armature with a fixed block. The fixed element is fixed to the tubular sprung structure, while the moving armature may be displaced against the fixed element for not less than 40 cm. ^ EFFECT: ability to make respective measurements without rendering difficulties to oil extraction. ^ 3 dwg