RU1639147C

RU1639147C - Method for detection of underground cavities

Info

Publication number: RU1639147C
Authority: RU
Inventors: М.А. Меринов; О.П. Бобров; П.К. Савченко
Original assignee: Иркутский государственный научно-исследовательский институт редких и цветных металлов
Priority date: 1987-12-23
Filing date: 1987-12-23
Publication date: 1995-01-20

Abstract

FIELD: mining industry. SUBSTANCE: method for detection of underground cavities includes drilling of vertical hole rings from the side of open pit in zone of expected cavity, square to its extension. After detection of cavity, its boundary points are determined by drilling horizontal holes in the horizon crossing the cavity. When cavity is not detected by vertical hole ring, drilled is hole ring at an angle to plane of vertical hole ring. In so doing, holes are spaced by staggered manner relative to holes of previous hole ring. Then, vertical hole rings across the extension of cavity between boundary points of detection horizon are drilled. EFFECT: cut down expenditures for outlining of cavities, mainly, extended in shape, with improved safety of work. 3 cl, 2 dwg

Description

Изобретение относится к горной промышленности и может быть использовано для обнаружения пустот в зоне выделения открытых горных работ. The invention relates to the mining industry and can be used to detect voids in the area of allocation of open cast mining.

Цель изобретения - снижение затрат на оконтуривание пустоты преимущественно вытянутой по простиранию формы при повышении безопасности работ. The purpose of the invention is to reduce the cost of contouring the void predominantly elongated along the strike of the form while increasing the safety of work.

На фиг. 1 показан борт карьера с подземной выработкой, а также веера вертикальных скважин и рудное тело в зоне влияния подземных разработок, разрез; на фиг.2 - борт карьера в плане. In FIG. 1 shows the side of a quarry with underground mining, as well as fans of vertical wells and an ore body in the zone of influence of underground mining, a section; figure 2 - board quarry in plan.

Способ осуществляется следующим образом. The method is as follows.

Со стороны карьера в направлении центра предполагаемой пустоты 1 перпендикулярно ее простиранию с площадки 2 уступа 3 бурят вертикальный веер скважин 4. From the side of the quarry in the direction of the center of the alleged void 1, perpendicular to its strike from the platform 2 of the ledge 3, a vertical fan of wells 4 is drilled.

Не обнаружив пустоту, вертикальным веером скважин 4 бурят дополнительно веер скважин 5 наклонно к плоскости веера скважин 4, располагая скважины вееров 4 и 5 в шахматном порядке относительно друг друга. Not finding a void, a vertical fan of wells 4 additionally drills a fan of wells 5 inclined to the plane of the fan of wells 4, arranging the wells of fans 4 and 5 in a checkerboard pattern relative to each other.

При условии обнаружения пустоты одной из скважин вееров 4 и 5 бурят веер скважин 6 на горизонт пустоты, прослеживая пустоту по простиранию. По крайним граничным точкам пересечения пустоты с веером скважин 6 бурят вертикальные веера скважин 7-10 вдоль простирания пустоты прослеживания ее вкрест простирания. По точкам пересечения скважин вееров 7-10 с границами пустоты определяют ее контур, геометрические размеры и зону обрушения 11. После гашения пустоты 1 производят разнос борта и отработку рудного тела 12. If one of the wells is found to be empty, fans 4 and 5 are drilled to drill holes 6 into the empty horizon, tracing the empty along strike. At the extreme boundary points of intersection of the void with the fan of wells 6, vertical fans of boreholes 7-10 are drilled along the strike of the void, tracking it across the strike. The points of intersection of the wells of fans 7-10 with the boundaries of the void determine its contour, geometric dimensions and collapse zone 11. After the quenching of the void 1, the bead is blown apart and the ore body 12 is mined.

Claims

1. METHOD FOR DETECTING UNDERGROUND VOIDS, including drilling wells into the horizon of the alleged void, crossing the well and outlining it, characterized in that, in order to reduce the cost of contouring the voids of a predominantly elongated shape strike while improving work safety, drilling is performed from the open pit, first perpendicular to the strike of the alleged void in a vertical plane, a fan of wells is drawn, after the void is detected, the boundary points of the void propagation are determined by conducting and from the same point of the horizontal fan of the wells on the horizon of the well intersecting the void, and then by drilling the fans of the wells across the extension of the void between the boundary points of the detection horizon.

2. The method according to claim 1, characterized in that if the voids are not detected by a vertical fan of wells, the next fan of wells is placed in a plane at an angle to the plane of the vertical fan of the wells.

3. The method according to claim 2, characterized in that the wells in inclined planes are staggered relative to the wells of the previous fan of the wells.