Title (en)

PROCESS FOR SINKING AND SEALING A BLAST HOLE

Title (de)

VERFAHREN ZUM TEUFEN UND ABDICHTEN EINER SPRENGBOHRUNG

Title (fr)

PROCEDE DE CREUSAGE ET D'ETANCHEMENT D'UN TR0U DE MINES

Publication

EP 0885372 B1 20001108 (DE)

Application

EP 94908201 A 19930818

Priority

• DE 9300743 W 19930818
• DE 4227724 A 19920821

Abstract (en)

[origin: DE4227724A1] A process is disclosed for sinking and sealing a blast hole for the seismic reconnaissance of geologic formations. The blast hole is sunk by a direct flush drilling process and is filled with a sealing material. As drilling fluid a slowly hardening hydraulic suspension made of water and a finely granulated mixture of clay minerals and hydraulic binder is used. After the blast hole is finished and the charge of explosives is introduced therein, the blast hole is filled with the suspension set so that it cures within 48 hours within the blast hole into a tight and solid stopper.

IPC 1-7

F42D 1/24

IPC 8 full level

F42D 1/12 (2006.01); F42D 1/24 (2006.01)

CPC (source: EP)

F42D 1/12 (2013.01); F42D 1/24 (2013.01)

Citation (examination)

EP 0403025 A2 19901219 - SHELL INT RESEARCH [NL]

Designated contracting state (EPC)

DE DK NL

DOCDB simple family (publication)

DE 4227724 A1 19940224; AU 4941893 A 19940315; DE 4393917 D2 19950921; DE 59310120 D1 20001214; EP 0885372 A1 19981223; EP 0885372 B1 20001108; PL 171842 B1 19970630; PL 312381 A1 19960415; WO 9404885 A1 19940303

DOCDB simple family (application)

DE 4227724 A 19920821; AU 4941893 A 19930818; DE 4393917 T 19930818; DE 59310120 T 19930818; DE 9300743 W 19930818; EP 94908201 A 19930818; PL 31238193 A 19930818